Sheet material



FIG. 1 is a front, bottom and left perspective view of a sheet material according to my new design; and,

FIG. 2 is a front view thereof.

The broken line surrounding the front of the sheet material depicts the boundaries of the claim and forms no part thereof. All other broken lines including the depth of the sheet material shown in FIG. 1 depict environment that forms no part of the claimed design. 

CLAIM The ornamental design for a sheet material, as shown and described. 